build(deps): bump crypto-bigint from 0.5.4 to 0.5.5 (#477)

Bumps [crypto-bigint](https://github.com/RustCrypto/crypto-bigint) from 0.5.4 to 0.5.5.
- [Changelog](https://github.com/RustCrypto/crypto-bigint/blob/master/CHANGELOG.md)
- [Commits](RustCrypto/crypto-bigint@v0.5.4...v0.5.5)

---
updated-dependencies:
- dependency-name: crypto-bigint
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>